Carrier WeatherMaster 50GC 04-06 Series, Installation Instructions Manual

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Thermidistat™ with isolated contact set for dehumidification con-
trol. See Fig. 38 and Fig. 39. The humidistat is normally used in
applications where a temperature control is already provided
(units with SystemVu™ control).
Fig. 38 — Accessory Field-Installed Humidistat
Fig. 39 — Edge ® Pro Thermidistat
Connecting the Carrier Humidistat (HL38MG029)
1. Route the humidistat 2-conductor cable (field-supplied)
through the hole provided in the unit corner post.
2. Feed wires through the raceway built into the corner post (see
Fig. 32) to the 24v barrier located on the left side of the con-
trol box. The raceway provides the UL-required clearance
between high-voltage and low-voltage wiring.
3. Connect one of the leads from the 2-conductor cable to the
HUM terminal on the UCB (Unit Control Board). Connect
the other lead to the R terminal on the UCB. See Fig. 40.
Fig. 40 — Humidistat Connections to UCB
Connecting the Thermidistat device (33CS2PPRH-01)
1. Route the Thermidistat multi-conductor thermostat cable
(field-supplied) through the hole provided in the unit corner
post.
2. Feed wires through the raceway built into the corner post (see
Fig. 32 on page 18) to the 24-v barrier located on the left side
of the control box. The raceway provides the UL-required
clearance between high-voltage and low-voltage wiring.
3. The Thermidistat has dry contacts at terminals D1 and D2
for dehumidification operation (see Fig. 41). Connect D1 to
the R terminal on the UCB. Connect D2 to the HUM termi-
nal on the UCB. Refer to the installation instructions
included with the Carrier Edge Pro Thermidistat device for
more information.
TYPICAL UNIT WIRING DIAGRAMS
See Fig. 42 and 43 for examples of typical unit control and power
wiring diagrams. These wiring diagrams are mounted on the in-
side of the unit control box cover.
% RELATIVE HUMIDITY
®
HUMIDISTAT
UNIT CONTROL
BOARD
THERMOSTAT
C
HUM
G
W2
W1
Y2
Y1
R